Prerequisites: Base attack bonus +3, Constitution 13Benefit: A number of times per day equal to your Constitution bonus, you an enter a battle rush. This rush lasts for ten minutes. While in a battle rush, half of any damage you inflict on an enemy in melee gets returned to you as temporary hit points. These temporary hit points are lost first when you take damage, and automatically vanish at the end of the battle rush period.Note: For the purposes of this feat, an enemy is only counted if they are aware of your presence, and have a chance of causing hit point damage to you in that round. It does not count if you hypothetically leave yourself open to attack (only your actual actions that round count), but it does count if they can do so in a way that puts them at greater risk than might otherwise be considered safe.